Physiological control scheme of jaw simulator JSN/2A for improving reproducibility of open-close movement

Hayashi, Tetsutaro; Kato, Shigeru; Nakajima, S.; Yamada, Yoshiaki; Kobayashi, Hiroshi

doi:10.1109/iembs.1999.802642

Cited by 8 publications

(2 citation statements)

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“…This development was motivated by a desire to reproduce a life-like open-close movement [92][93][94] and focused on the coordinated activities of several jaw muscles for mastication. This development was motivated by a desire to reproduce a life-like open-close movement [92][93][94] and focused on the coordinated activities of several jaw muscles for mastication.…”

Section: Jaw Simulatormentioning

confidence: 99%

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Mastication Robots

Bronlund

2010

Studies in Computational Intelligence

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PrefaceThe biological systems we see around us as birds, trees and animals have evolved over millennia. They are complex systems adapted for a multitude of functions including flight, running, reproduction, and digestion. There has been an increasing awareness of these systems by engineers who are now looking to biology as inspiration for design. Mechanical and robotic designs have been developed based on the biomechanics of humans and animals. Similarly computer algorithms, artificial intelligence and control systems have been developed from genetic or neurological principles.In the study of food science, there has been an increasing trend for engineers and technologists to look further and further down the food product life cycle. In the past the focus has been on food 'from farm-gate to the plate'. In recent times research has looked past the plate to study what happens to the food in the mouth, during swallowing and throughout the digestion process. Food structures are now being designed from an understanding how the food properties interact with the physiological processes occurring in the mouth and the gut. In this way foods aimed at prevention of diet related disorders can be developed.In this book we look to merge these two perspectives by developing robots to simulate human mastication. The development of these robots can be applied to physical simulation of human chewing and provide insights into the relationships between food structure and perceived texture during mastication. By developing chewing robots, mechanical design, artificial intelligence and control strategies might be developed for use in other completely unrelated applications.The robotic simulation of the human mastication system offers a chance to study the biomechanics and control of a complex system. The human mandible is compact and yet it can apply large forces. It can adapt to effectively breakdown disparate materials ranging from fibrous structures like bran to hard brittle foods such as nuts or tough sticky materials like toffee. The jaws trajectory can be controlled to achieve rapid movement without biting the surrounding oral structures such as the cheeks or tongue. Biting is abruptly stopped if even a small unexpected hard object (such as a fragment from an olive pit) is detected between the occlusal surfaces of the teeth. The jaw muscles are strong enough to enable Malaysian strongman "King Tooth" to pull a seven coach train over 4 metres with his teeth and yet we control this force well enough to move a marshmallow with our teeth and barely leave a mark. Understanding how nature achieves this amazingly Preface VI broad functionality can potentially lead to a next generation of mechatronic devices or methodologies for their control.The use of robotic systems to simulate chewing of foods by humans offers tremendous advantages over existing food texture characterisation methods. A robotic jaw can be fully instrumented to allow real time measurement of the magnitude and direction of the forces applied to the food. The true trajec...

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Section: Jaw Simulatormentioning

confidence: 99%

“…The most advanced JSN jaw simulator was the JSN/2A [93]. It involves two DOFs and consists of six muscle actuators; being the masseter, lateral pterygoid, interior pterygoid, digastric, anterior temporalis and post temporalis.…”

Section: Jaw Simulatormentioning

confidence: 99%